Nozzles in elastic-fluid turbines.



0. JUNGGRBN. NOZZLES IN BLASTIG FLUID TURBINES. APPLICATION FILED SEPT.1I, 1914.

1,1 18,352n Patented Nov. 24, 1914.

Witness-Bes: Inventor:

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MWW/ H I His Attorneg.

'UNITED sTA'rEs rrrnuir ernten.

CSCAR JUNGGREN, 0F SCHENECTADY, NEW YORK, .ASSIGNOR TO GENERAL ELECTRICCOMPANY, .A CORPORATION OF NEW YORK.

NOZZLES IN ELASTIC-ELUID TURBINES.

Specification of Letters Patent.

Application tiled September 11, 1914. Serial No. 861,283.

T0 @ZZ tri/mm it may concern `Be it known that I, OSCAR JUNGGREN, acitizen ot' the United States, residing at Schenectady, county ofSchenectady, State of New York, have invented'certain new and usefulImprovements in Means for Attaching Nozzles'to Diaphragms inElastic-Fluid Turbines, of which the following is a specification.

The present invention relates to elasticfluid turbines and particularlyto means for attaching the nozzles to the diaphragms.

In turbines where the nozzles are formed separate from the diaphragmsand'attached thereto, considerable difficulty has been experienced,especially in the first stages of high pressure machines, where both thetemperatures and pressures are high, in firmly anchoring the nozzles tothe diaphragms. This has been especially true where the nozzles havebeen formed of a material different from the diaphragm, as for example,bronze, as there has been a tendency for the nozzles to soften andyield, permitting more or less leakage and distortions.

'l`he object of the present invention is to provide an improvedfastening means for attaching the nozzles to the diaphragm which willeffectually overcome the above difficulties.

For a consideration of what I believe to be novel and my invention,attention is directed to thev accompanying description and claimsappended thereto.

Referring to the drawing, Figure 1 is a sectional view through a portionof a turbine illustrating my invention, and Fig. 2 is a plan view of' aportion of a diaphragm showing the nozzles and attaching means.

il indicates the outer shell or casing of a turbine and -lthe diaphragmthrough which are the usual openings 5for the passage of the elasticfluid.

#lL is a shoulder or projection on the diaphragm l.

fi are nozzles arranged to direct the elastic fluid passing through theopenings in the diaphragm against the buckets 7 carried by the webmember b of a turbine rotor. A single wheel having two rings of bucketswith a ringr of internudiate directing vanes s between is illustrated.The nozzles may extend all or only part of the way around the diaphragm,depending upon the requirements, and are here illustrated as beingformed in sections as shown in Fig. '2. The sections are ofu convenientlength,land comprise side members 10 between which are arranged thepartitions 11, the spaces between the partitions forming the nozzlepassages which may be diverging or non-diverg ingl in character. Thebases of the nozzle sections are provided with flanges l2 by means ofwhich the nozzles are fastened to the diaphragms. The fastening meanscomprise segmental bars 13 'having flanges 11 which fit over the flangesof the nozzle sections and engage the faces thereof. The on'e bar 13fits against the shoulder 4t on the diaphragm. The inner surfaces l5 ofthe. flanges lei fit tightly against the outer portion of the nozzlesections. This serves to brace the same and prevent their yielding underthe high temperatures and pressures met with. 'lherc is a slightclearance between the sides of the flanges 12 and the members 12% asindicated at 1G and the members 1&5 are eut away as at 17 so that theyengage the diaphragm only at their outer sides as indicated at 18. Thebars 13 are fastened to the diaphragm by means of spaced threaded bolts19. lhen these bolts are secured in place the bars 13 will give slightlyso as to cause the flanges of the nozzle sections to be very firmly heldagainst the diaphragm and at the same time the outer portion of thenozzles will be squeezed between thel flanges 1t at the points 15 so asto brace the same. 'lhe nozzles are thus firmly and uniformly pressedagainst the diaphragm at every point and there is no opportunity `forleakage to occur between the. nozzles and the diaphragm as mightotherwise be the case. At the same time the fastening members 13 squeezethe outer portions of the nozzles between them and. hold them to shape.

Patented Nov. 24, 1.114. l

lin the present instance the segmental bars are shown of such length asto embrace three nozzle sections, but it will be understood thatthis isa matter of design, as any suitable. relative lengths may be used. ltwill be noted that the joints between the segmental Yfastening ba rs areaxially alined with the joints between adjacent nozzle sections. Thispermits one group of nozzle sections to be ren'ioved 'for repair orother purpose without disturbing the other.

The drawing shows my invention as applied to a vertical turbine, but itwill be understood that it is equally Well adapted for a horizontalmachine, and that any rei'.am erenees to direction are Wholly relative.

In accordance With the provisions of the patent statutes, l havedescribed the principle of operation of my invention, together i byLetters Patent of the United States, is,-

1. iin an elastic-Huid turbine, the combination of a diaphragm, a nozzlehaving flanges on its two sides, and means 'for taste-ning the fiangesto the diaphragmf comprising shouldered members which lit over thel'langes and maken elose lit With the face of the 'flanges and the sidesof the outer portion of the nozzle, and means for fastening the membersto the diaphragm.

2. lin an elastiofluid turbine, the combination et' a diaphragm, anozzle having Hanges on its tvvo sides, and means for fastening miserieeach tia-nge to the diaphragm comprising a shouldered member which litsover the ti'ange and maires a elose fit with the face .f

tion of a diaphragm, nozzle sections having flanges on their sides, andmeans for tastening the flanges to the 'diaphragm comprising a fasteningV.member having a shoulder which nts over a lange and makes a elose fitwith the tace of the flange and the side of the nozzle, said memberbeing eut away so that it engages with the diaphragm only .at its outeredge, and means for attaehing the fastening member to the diaphragm..

ln Witness whereof, l have hereunto set my hand this 10th day ofSeptember, 1914. @SCAR JUNGGREN. llVitnesses:

F.. M. BnAonrsH, BENJAMIN HULL.

